Old (big) mag cards?

[johnb]

(07-06-2023 01:16 AM)blackjetrock Wrote:  Yes, I never thought of it like that, but then I used to work on machines that measured coercivity, so I'm more familiar with the concept.

Yep, I know what you mean!

I've been a science geek as long as I can remember. Since about age 5 I knew I would be a scientist or an engineer -- or maybe an astronaut -- it was merely a question of figuring out which one I would stick with as a career, LOL.

And even with that, I find I forget all sorts of symbols and concepts that I once knew, and some of them I knew well.

"If you don't use it, you lose it!"

LOL... saying that, I'm astonished at how much nuclear physics I've managed to retain, 36 years after leaving the Navy (yup, I was a submarine nuc operator). But still... even though I can remember the 6-factor formula and some others, I doubt I remember correctly which Greek letter represents "Average Logarithmic Energy Decrement," much less how to calculate it. (Betcha there is a log() in there somewhere, haha!) I could check the math of a modern RO for his startup calculations, but I sure couldn't verify the logic was correct.